/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.core;



import com.bff.gaia.unified.sdk.util.common.ElementByteSizeObserver;



/**

 * An interface for things that allow observing the size in bytes of encoded values of type {@code

 * T}.

 *

 * @param <T> the type of the values being observed

 */

public interface ElementByteSizeObservable<T> {

  /**

   * Returns whether {@link #registerByteSizeObserver} is cheap enough to call for every element,

   * that is, if this {@code ElementByteSizeObservable} can calculate the byte size of the element

   * to be coded in roughly constant time (or lazily).

   */

  boolean isRegisterByteSizeObserverCheap(T value);



  /**

   * Notifies the {@code ElementByteSizeObserver} about the byte size of the encoded value using

   * this {@code ElementByteSizeObservable}.

   */

  void registerByteSizeObserver(T value, ElementByteSizeObserver observer) throws Exception;

}